What stepper driver is it? 2.99V might not be enough? What's the equivalent voltage for one of the drivers that is working.

For instance, if it's a M752 driver they have a 270 ohm resistor in series with the opto-isolator, which gives the correct current for those to switch on with 5V, not 3V ... 3V may not be sufficient.

Just re-read your post and noticed you said all the drivers, so that's all irrelevant! I'll leave it just in case it helps someone else.

It doesn't sound like a mechanical fault, as the motor isn't stalling it's just moving the wrong way? Have you tried putting a different driver on the C-axis? Swap Y and C for instance...if it works then you know it's not a mechanical fault and must be something wrong with the driver. I once had an optoisolator break on one of my drivers, connected it wrong, so I just soldered a new one in and it's fine.